Rewinding machine



Oct 19444 P. J. CHRISTMAN 2,361,255

REWINDING MACHINE Filed April 20. 1944 4 Skeeter-Sheet 1 J INVENTOR.-92;-

1944. P J. CHRISTMAN REWINDING MACHINE Filed April 20, 1944 4Sheets-Sheet 2 IN VEIV1 TOR.

I an BY MW H 770E/VEV5.

Oct. 24, 1944. P, J. CHRISTMAN 3,361,265

nmwmnme MACHINE Filed April 20. 1944 4 Sheets-Sheet a INVENTOR.

Oct. 24, 1944. P. J. CHRISTMAN 2,361,265

REWINDING MACHINE Filed April 20, 1944 4 Sheets-Sheet 4 IN V EN TOR.

Patented Oct. 24, 1944 UNITED STATES PATENT OFFICE" nnwnvnme MACHINEPeter J. Christman, Green Bay, Wis., assignor to Paper ConvertingMachine Co. Inc., Green Bay, Wis., a corporation oi WisconsinApplication April 20, 1944, Serial No. 531,904

11 Claims.

a rewinding machine having novel means for effecting a transfer of theweb from the wound rolls on one mandrel to the empty cores on asucceeding mandrel while the apparatus is operating at full speed.

A further object of the invention is to provide in a rewinding machinemeans for causing a breaking of the web between the wound rolls on onemandrel and the rolls which are just being started on a succeedingmandrel, said means being operable without using a knife or othercutting instrumentality.

A more specific object of the invention is to provide in an apparatussuch as is described in my pending application, Serial No. 525,156 filedMarch 6, 1944, having mechanism arranged to deflect and form a. loop ina portion of the moving web which is intermediate one mandrel beingwound and a next succeeding mandrel and having means for tucking the webinto thenip between the cores on the succeeding mandrel and an engagingroller, mechanism for causing a. drag on the roll that is being woundsufficient to allow slack in the looped web portion so that when saidslack is taken up by the'tucking means a desired brealr of the web on aline of perforations will result. Thus the necessity of using a knife tosever the web is eliminated.

While the above object may be accomplished by various mechanicallyequivalent means for creating the drag, it is preferred to utilizeajsuction for effecting the desired result. Accordingly a specificobject of the present invention is to provide suction means orequivalent means in the transfer bar of the loop forming mechanism, saidsuction being operable to momentarily retard the movement of the webtoward the rolls which have just been fully wound.

A further object of the invention is to provide a, device. as abovedescribed, wherein the means for causing the drag on the web iscontrolled in timed relationship'with other cooper- 'ating parts of themachine and wherein it is operable quickly at the proper moment in thecycle of operation.

Other objects .of the invention are to provide a rewinding machine whichis strong and du-. rable, which is speedy in operation, which willaccurately produce aroll of the desired size, and which is otherwisewell adapted for the purposes described.

With the above and other objects in view the invention consists of theimproved rewinding machine and all its parts and combinations as setforth in the claims and all equivalents thereof.

In the accompanying drawings illustrating one complete embodiment of thepreferred form of the invention,

Fig.1 is an elevational view of one end of the machine, parts beingbroken away;

Fig. 2 is a top plan view thereof, part of the transfer bar being brokenaway and shown in section;

Fig. 3 is a fragmentary view showing the opposite end of the machinefrom Fig. 1 and taken approximately on the line 3-3 of Fig. 2;

Fig. 4 is a vertical sectional view taken approximately on the line 4- 1of Fig. 2 and showing the position of the parts as the transfer bar ismoved forwardto deflect the web;

Fig. 5 is a view similar to Fig. 4 showing the position of the transferbar just before the web is transferred to the empty cores;

Fig. 6 is a similar view showing the position of the parts at the timeof actual transfer and just after the suction has been applied and Justafter the web has been broken due to movement of the tucker bar intaking up the slack, the connections with the suction valve and suctionpump be ng also illustrated; and I Fig. '7 is a similar view showing thetransfer bar moving back out of the path of the mandrel holder, theconnections with the suction valve and suction pump beingalsoillustrated.

Referring more particularly to the drawings the machine includes asuitable supporting frame having spaced side members it and ii. A mainshaft i2 is suitably journaled in the machine and is driven from anoutside source through the pulley it. The shaft it rigidly supports abed roll it so that as the shaft is driven the bed roll rotates.Referring to Fig. 1 the bed roll shaft l2 carries a bed roll gear itwhich in turn drives gears it, ill, it and it. The gear it is rigidlymounted on a shaft 20 for a pull roll 21!.

The gear I1 is rigidly mounted on a shaft 22 for perforating of sheetmaterial which passes between the bed roll and the perforating roll.

The gear 18 is rigidly mounted on a shaft 25 web to a predeterminednumber of widths.

which drives a slitter roll 26. The slitter roll is formed with suitablyspaced circumferential knives 21 which cooperate with circumferentialgrooves in the bed roll to cause slitting of the The gear is is rigidlymounted on a shaft 28 which drives a second pull roll 29.

Also rigidly connected to the bed roll shaft I2 is a worm 30 whichdrives a worm wheel 3|. The worm wheel 3| is rigidly mounted on a.horizontal shaft 32 and the shaft 32 carries a bevel gear 33 rigidly onits outer end. The bevel gear in turn drives a bevel gear 34 mountedrigidly on a cam shaft 35 which extends through the frame. The shaft 35also carries a rigidly mounted sprocket wheel 38 which is connected by asprocket chain 31 with a sprocket wheel 38 mounted rigidly on a shortshaft 39 near the top of the side member ID (see Fig. 1).

The short shaft 39 carries a rigidly mounted gear 40 and this gear ispreferably formed with a toothless gap 4|. The gear 40 in turncooperates, with an intermittent gear 42 rigidly mounted on a mandrelholder shaft 43. The intermittent gear 42 is formed with three toothlessgaps 4 The shaft 43 carries spaced mandrel holding members 45 and 46(see Fig. 2). Each of these members consists of three arms extendingradially from a hub portion. The outer end of each arm forms a suitablebearing for a rotatable holder 41. Each of the rotatable holders 41 atone side of the machine is equipped with a drive pulley 48. Mandrels 49are removably insertable, in any wellknown manner, between the mandrelholders 45 and 48 in such a manner that when the drive pulley 48 for aparticular mandrel holder is rotated that the attached mandrel 49 willbe likewise rotated. Each of the mandrels 49 is adapted to receivea'pluraiity of cardboard cores in such a manner as to cause rotation ofthe cores when they are in position on the mandrel.

Referring to Fig. 1, on the outer end of the bed roll shaft there isalso mounted a friction drive pulley 5! which is connected by an endlessbelt 52 with a smaller pulley 53 at the top of the frame. The pulley 53is mounted on a shaft 54 and said shaft carries on its inner end apulley 55 (see Fig. 2). The pulley 55 drives an endless drive belt 56which is also threaded around a belt tightener pulley 51 and an idlerpulley 58. That portion of the length of the friction drive belt 56which extends between the pulley 55 and the idler pulley 58 is alwaysdeflected, in the manner shown in .Fig. 1, by engagement of certain ofthe mandrel driving pulleys 48 therewith. Thus, movement of the endlessdrive belt 58 causes rotation of those mandrels whose drive pulleys arein engagement with the drive belt 58 at a particular time in the cycleof operation.

On the end of the cam shaft 35 opposite to the end which carries thebevel gear 34 is an internal cam 59 (see Figs. 2 and 3) having a camgroove 68. Mounted for oscillation on a stud 8| is an arm 82 formed witha gear segment 63 at its upper end. Connected to the arm 82 andextending toward the internal cam is a shorter arm 84 equipped with'acam follower 85 which rides in the cam groove 80. The gear segment 83cooperates with a gear 66 rigidly mounted on a transfer arm shaft 81..The transfer arm shaft is tubular throughout the major portion of itslength to provide a suction duct 81'. Referring now to Fig. 2 and Figs.4 to 7 inclusive, the

transfer arm shaft 81 has rigidly mounted thereon, in spaced position,transfer arms 88. The free ends of these arms are connected by atransfer bar 89 which has the cross-sectional shape shown in Figs. 4 to7. A tucker pivot shaft HI connects the transfer arms 88 and has itsends pivoted in said arms. The tucker pivot shaft has rigidly connectedthereto, in spaced position, a plurality of tucker arms H and thesetucker arms are connected at their free ends by a tucker bar 12. Thetucker bar 12 is normally maintained in an inactive position against astop 13 by means of a coil spring 14. The tucker arm shaft 10 isequipped with a projecting actuating lug 15. This lug is adapted to beengaged by one of the fixed studs 18 projecting from each mandrel holderarm, and this engagement causes movement of the tucker arms II andtucker bar 12 to the position of Fig. 6 when the transfer bar is in theposition of said figure.

It is a novel feature of the present invention to provide suitable meansfor causing a drag on the portion of the web which is between the topmandrel (Fig. 6) and the next succeeding mandrel. This retards the rollbeing wound on the top mandrel sumciently to allow slack in the loopedweb portion of Fig. 6 so that when the tucker bar 1.2 is moved to theposition of Fig. 6 it will take up this slack and at the same time causethe web to break on a, line of perforations as at 11. These perforationsare at regular intervals in the web and have previously been made by theperforating teeth 24 of the roll 23. The timing must be such that a rowof perforations is located at the point 11 of Fig. 6 when the tucker bar12 is actuated.

As one method of creating the desired drag the transfer bar 69 is formedwith a longitudinal suction duct 18 which extends near each transfer arm68. Suction ports 18 extend transversely at intervals from the duct 18to the face of the transfer bar. The ends of the duct 18 communicatewith ducts 88 near the transfer arms and the latter are connected byflexible tubes 8| with the tubular interior duct 61 of the transfer armshaft 61. One end of the duct 81' is in turn connected by a flexiblesuction conduit 82 with a valve 83. The valve 83 (see Figs. 2 and 6)comprises an inner member 84 keyed to the cam shaft 35, and a fixedouter member 85 which is secured to the frame side member H. The outermember has a port 86 to which the conduit 82 is connected, and hasanother port 81, at about 90 from the port 86 which is connected by aconduit 88 with a suction pump 88. The inner valve member has a duct 84therein which connects the pump with the suction line 82 only when thevalve is in the position of Fig. 6. This suction is timed by the valve83 to not just before and while the tucker bar 12 moves to the positionof Fig. 6. The suction has enough strength to retard the winding of thetop roll of Fig. 6 so as to allow slack to be engaged by the tucker bar.When the slack is taken up, however, the tucker bar exerts a pull on theweb, but as the web is temporarily bound to the transfer bar by thesuction at the ports 18, the web will be broken on a line ofperforations as at I2. The arrangement and timing are such that a lineof perforations, made by the teeth 24, are at a proper location when thetucker bar and suction are acting.

Operation When the bed roll shaft 12 is driven it will simultaneouslycause driving of the pull rolls l8 9,801,265 and n and of theperforating roll "and slitter roll l3. The bevel gears 33 and 34 willcause driving of the cam shaft 3-! and through the sprocket wheels 38and 40 driving of the intermittent gear 42 for the mandrel holder. Inaddition the'endless belt connection 52 with the top pulley 53 willcause driving of the friction drive belt SI.

A web of toilet tissue, paper toweling or other sheet material, which isfed from a jumbo roll 80, passes over the top of the pull roll l6 andthen downwardly around the bed roll I! between the latter and the rollsl1, l8 and IS. The web then extends upwardly around the bed roll andbeneath one of the mandrels to the uppermost mandrel whose cores 50 arebeing wound. As the internal cam 58 rotates, it will, through the actionof the cam follower 65 and arms 84 and 82, gear segment 63 and gear 66.cause rocking of the transfer arm shaft to cause movement of thetransfer arms in the direction indicated by the arrow in Fig. 4. Thiscauses deflection of that portion of the web which is between themandrel being wound and the next succeeding mandrel- The rolls of paperon the uppermost mandrel of Fig. 4 are nearly wound. Through the actionof the cam 58 the transfer bar 69 continues its movement from theposition of Fig. 4 to the positionof Fig. 5, making a loop 9| in the weband wrapping it nearly around the empty cores on the mandrel which isadjacent the bed roll. All of this time the drive Pulleys 4B for themandrel which is being wound and for the next succeeding mandrel are inengagement with the drive belt 55. as shown in Fig. 1, and the mandrelsand cores thereon are being rotated. The third mandrel is not beingrotated and is in the position shown in Fig. 1 where the mandrel may bedisconnected, the wound rolls removed and a new set of cardboard cores50 inserted. Following the position oi Fig. the cam follower 65 (seeFig. 3) drops into a quick cam drop portion 92 of the cam groove tocause a quick forcing of the transfer bar from the position of Fig. 5 tothe position of Fig. 6. During this period one of the blank spots M ofthe intermittent mandrel holder drive gear is opposite the blank sectionM of the gear At. This causes a momentary dwell in the rotation of themandrel holder on the shaft 43. As the transfer bar 69 moves to theposition of Fig. 6, the tucker actuating lug 15 engages the stud t6 tocause swinging of the tucker arm H and tucker bar 72 from the positionof Fig. 5 to the position of Fig. 6 against the tension of the springit. Just before the tucker bar i2 moves from the position of Fig. '5 tothe position of Fig. 6, the suction timing valve 83 is rotated by theshaft 35 to the position shown in Fig. 6. This connects the suctionconduit 82 with the suction pump 89 and causes a suction to take placeon the portion of the web which is against the transfer bar ports 19.This suction client which starts to act just before the tucker barmoves, creates a drag on the web to retard the winding of the roll onthe uppermost mandrel. Inasmuch as the bed roll I4 is still rotating, aslight amount of slack will be built up in that portion of the web whichis shown as engaged by the tucker bar in Fig. 6. However, as soon as thetucker bar is actuated, this slack will be taken up and, in addition, apull will be exerted on the web by the tucker bar. Inasmuch as part ofthe web is temporarily held by the suction against the transfer bar, thepull exerted by the tucker bar will cause a breaking of the web on aline of perforations as at 17 (Fig. 6). The timing of the machine issuch that there is a row of per-' forations, previously created by theperforating knives, located at the point 11 when the tucker bar isactuated. The newly broken web portion is then tucked into .the nipbetween the bed roll and the cores on the lowermost mandrel as shownrounding of the empty cores by the web and an overlapping of the tuckerportion so that upon tit continued rotation of the paper cores the webwill begin to wind and build up thereon The mandrel holder will againstart to rotate after its momentary dwell and at the same time the camcontrol for the transfer bar will cause withdrawal movement of the barin the direction indicated by the arrow in Fig. 7 and ultimately to aposition clear of the rotating mandrels. As the newly started rolls onthe lower mandrel move upwardly they are being continually wound, asindicated in Fig. 7, and by the time they reach the top position theyare nearly fully wound. At the same time the fully wound rolls are beingmoved to the removal position by the mandrel holder.

It is apparent from the above that the winding operation is continuouseven while the transfer of the web from one mandrel to another is beingstarted. It is also clear that the novel transfer bar arrangement issuch as to cause a. very advantageous positioning of the web Just priorto breaking and tucking. The final quick action of the transfer baraccompanied by a quick suction action, and by a quick action of thetucker bar, completes the operation and causes a completely overlappedtuck of a broken web portion to be made on the succeeding cores. Thepresent invention makes it possible to transfer the web automatically atfull winding speed after a predetermined number of sheets or footage hasbeen wound onthe top mandrel. Due to the complete tuck-in and overlapillustrated in Fig. 6 there is no necessity for applying moisture or anadhesive to the web or empty cores in order to start winding.

While it is preferred to use the intermittent drive for the mandrelholder, in order to obtain more efiicient operation of the transfermechanism, nevertheless the invention may be utilized in connection witha continually rotating mandrel holder.

Various other changes and modifications may be made without departingfrom the spirit of the invention and all of such changes arecontemplated as may come within the scope of the 1 claims.

What I claim is: 1. In a rewinding machine for continuously winding atraveling web into rolls, means for creating weakened transverse tearlines in said web at spaced intervals, a rotary mandrel holder,circumferentially spaced rotatable mandrels supported in said mandrelholder, means for rotating each mandrel during part of its cycle ofmovement to wind the web thereon, means for rotating the mandrel holderto advance a succeeding mandrel into the path of the web which is beingwound on an advanced mandrel, transfer means for deflecting a portion ofthe web between said two mandrels to a position partially around saidsucceeding mandrel while said web is still being wound on the advancedmandrel, means for thereafter momentarily retarding the winding of theweb. on said advanced mandrel to create slack in that portion of the webwhich is partially around said succeeding mandrel, and mechanismoperable on said slack while said retarding means is effective forbreaking the web on a weakened tear line and causing winding on saidsucceeding mandrel.

2. In a rewinding machine for continuously winding a traveling web intorolls, means for creating weakened transverse tear lines in said web atspaced intervals, a rotary mandrel holder, circumferentially spacedrotatable mandrels supported in said mandrel holder, means for rotatingeach mandrel during part of its cycle of movement to wind the webthereon, means for rotating the mandrel holder to advance a succeedingmandrel into the path of the web which is being wound on an advancedmandrel, transfer means for deflecting a portion of the web between saidtwo mandrels to a position partially around said succeeding mandrelwhile said web is still being wound on the advanced mandrel, means forcreating a momentary drag on the portion of the web which is engaged bythe transfer means to temporarily retard the winding of the web on saidadvanced mandrel and create slack in the web adjacent the succeedingmandrel, and mechanism operable on said slack while said drag iseffective for breaking the web on a weakened tear line and causingwinding on said succeeding mandrel.

3. In a rewinding machine for continuously winding a traveling web intorolls, means for creating weakened transverse tear lines in said web atspaced intervals, a rotary mandrel holder, circumferentially spacedrotatable mandrels supported in said mandrel holder, means for rotatingeach mandrel during part of its cycle of movement to wind the webthereon, means for rotating the mandrel holder to advance a succeedingmandrel into the path of the web which is being wound on an advancedmandrel, transfer means for deflecting a portion of the web between saidtwo mandrels to a position partially around said succeeding mandrelwhile said web is still being wound on the advanced mandrel, suctionmeans for thereafter momentarily retarding the winding of the web onsaid advanced mandrel to' create slack in the Web adjacent thesucceeding mandrel, and mechanism operable on said slack while saidsuction means is effective for breaking the web on a weakened tear lineand causing winding on said succeeding mandrel.

4. In a rewinding machine for continuously winding a traveling web intorolls, means for creating weakened transverse tear lines in said web atspaced intervals, a rotary mandrel holder, circumferentially spacedrotatable mandrels supported in said mandrel holder, means for rotatingeach mandrel during part of its cycle of movement to wind the webthereon, means for rotating the mandrel holder to advance a succeedingmandrel into the path of the web which is being wound on an advancedmandrel, transfer means for deflecting a portion of the web between saidtwo mandrels to a position partially around said succeeding mandrelwhile said web is still being wound on the advanced mandrel, suctionmeans for creating a momentary drag on the portion of the web which isengaged by the transfer means to temporarily retard the winding of theweb on said advanced mandrel and create slack in the web adjacent thesucceeding mandrel, and mechanism operable on said slack while saidsuction drag is effective for breaking the web on a weakened tear lineand causing winding on said succeeding mandrel.

5. In a rewinding machine for continuously winding a traveling web intorolls, means for creating weakened transverse tear lines in said web atspaced intervals, a rotary mandrel hold,- er, circumferentially spacedrotatable mandrels supported in said mandrel holder, means for rotatingeach mandrel during part of its cycle of movement to wind the webthereon, means for rotating the mandrel holder to advance a succeedingmandrel into the path of the web which is being wound on an advancedmandrel, transfer means for deflecting a portion of the web between saidtwo mandrels to a position partially around said succeeding mandrelwhile said web is still being wound on the advanced mandrel, suctionmeans for thereafter momentarily retarding the winding of the web onsaid advanced mandrel to create slack in the web adjacent the succeedingmandrel, mechanism operable on said slack while said suction means isefiective for breaking the web on a weakened tear line'and causingwinding on said succeeding mandrel, and a timing valve for said suctionmeans.

6. In a rewinding machine for continuously winding a traveling web intorolls, means for creating weakened transverse tear lines in said web atspaced intervals, a rotary mandrel holder, circumferentially spacedrotatable mandrels supported in said mandrel holder, means for rotatingeach mandrel during part of its cycle of movement to wind the webthereon, means for rotating the mandrel holder to advance a succeedingmandrel into the path of the web which is being wound on an advancedmandrel, transfer means for defle'cting a portion of the web betweensaid two mandrels to a position partially around said succeeding mandrelwhile said web is still being wound on the advanced mandrel, means forthereafter momentarily retarding the winding of the web on said advancedmandrel to create slack in a portion of the web adjacent said succeedingmandrel, and a tucker member engageable with said slack to take up thelatter and break the web on a weakened tear line and then tuck saidslack into a position where it is overlapped by the web'on saidsucceeding mandrel.

7. In a rewinding machine for continuously winding atraveling web intorolls, means for creating weakened transverse tear lines in said web atspaced intervals, a rotary mandrel holder, circumferentially spacedrotatable mandrels supported in said mandrel holder, means for rotatingeach mandrel during part of its cycle of movement to wind .-the webthereon, means for rotating the mandrel holder to advance a succeedingmandrel into the path of the web which is being wound on an advancedmandrel, a roll around which the web is guided positioned to be engagedby said succeeding mandrel, transfer means for deflecting and looping aportion of the web between said two mandrels to a position partiallyaround said succeeding mandrel while said web is still being wound onthe advanced mandrel, means for thereafter momentarily retarding thewinding of the web on said advanced mandrel to create slack in thelooped portion of the web adjacent the succeeding mandrel, and meansengageable with said slack to take up the latter and break the web on aweakened tear line and then tuck said slack into the nip between saidsucceeding mandrel and web guiding roll when the latter are engaged.

8. In a rewinding machine for continuously winding a traveling web intorolls, means for creating weakened transverse tear lines in said web atspaced intervals, a rotary mandrel holder, circumferentially spacedrotatable mandrels supported in said mandrel holder, means for rotatingeach mandrel during part of its cycle of movement to wind the webthereon, means for rotating the mandrel holder toadvance a succeedingmandrel into the path of the web which is being wound on an advancedmandrel, a movably supported transfer bar movable into engagement with aportion of the web which is traveling between said two mandrels to causelooping of said web portion and to move said looped portion to aposition partially around said succeeding mandrel while said web isstill'being wound on the advanced mandrel, means for thereaftermomentarily retarding the winding of the web on said advanced mandrel tocreate slack in the looped portion adjacent the succeeding mandrel, atucker bar movable with said transfer bar and mounted for independentmove ment with respect to the transfer bar, and means operable after thetransfer bar has. deflected the web a predetermined distance foractuating said tucker bar, said tucker bar being positioned and timed toengage said slack in the web .to take up the latter and break the web ona weaksupported in said mandrel holder, means for rotating each mandrelduring part of its cycle of movement to wind the web thereon, means forrotating the'mandrel holder to advance a succeeding mandrel into thepath of the web which is being wound on an advanced mandrel, a rockshaft journaled in said machine and having a suction duct therein, cammechanism for causing rocking of said shaft, spaced transfer bar armssecured to said rock shaft, a transfer bar connecting said arms andmovable upon rocking of the shaft in a predetermined direction to engagewith a portion'of the web traveling between said two mandrels to causelooping of said web portion and to movesaid looped portion to a positionpartially around said succeeding man- .drel while said web is stillbeing wound on the ened tear line and then tuck said slack into awinding a traveling web into rolls, means for' creating weakenedtransverse tear lines in .said

web at spaced intervals, a rotary mandrel holder, circumferentiallyspaced rotatable mandrels supported in said mandrel holder, means forrotating each mandrel during part of its cycle of movement to' wind theweb thereon, means for rotating the mandrel holder to advance asucceeding mandrel into the path of the web which is being wound on anadvanced mandrel, a movably supported transfer bar movable intoengagement with a portion of the web which is traveling between said twomandrels to cause looping of said web portion and to move said loopedportion to a position partially around said succeeding mandrel whilesaid web is still being wound on the advanced mandrel, suction meansincluding suction ports in the transfer bar for creating a momentarydrag on the portion of the web which is engaged by the transfer bar totemporarily retard the winding of the web on said advanced mandrel andcreate slack in the looped web portion adjacent the succeeding mandrel,a tucker bar movable with said transfer bar and mounted for independentmovement with respect to the transfer'bar, and means operable after thetransfer bar has deflected the webs, predetermined distance foractuating said tucker bar, said tucker bar being positioned and timed toengage said slack in the web to take up the latter and break the web ona weakened tear line and then tuck said slack into a. positionwhere itis overlapped by the web on the succeeding mandrel.

10. In a rewinding machine for continuously winding a traveling web intorolls, means for creating weakened transverse tear lines in said web atspaced intervals, a rotary mandrel holder, circumferentially spacedrotatable mandrels advanced mandrel, suction ports in said transfer bar,means adjacent the transfer bar arms I for connecting said suction portsin the transfer bar to the suction duct in the rock shaft, a source ofsuction, a suction conduit connecting said source of suction with thesuction duct in the rock shaft, a timing valve connected with saidconduit and driven by the machine for creating a momentary drag on theportion of the web which is engaged by the transfer bar to temporarilyretard the winding of the web on the advanced mandrel and create slackin the looped portion of the web adjacent the'succeeding mandrel, atucker bar movable with said transfer bar and mounted for independentmovement with respect to the transfer bar, and means operable after thetransfer bar has defiected the web a predetermined distance foractuating said tucker bar, said tucker bar being tear line and then totuck said slack into a position where it is overlapped by the web onsaid succeeding mandrel.

11. In a rewinding machine for continuously winding a traveling web intorolls, means for creating weakened transverse tear lines in said web atspaced intervals, a rotary mandrel holder, circumferentially spacedrotatable mandrels supported in said mandrel holder, means for rotatingeach mandrel during part of its cycle of movement to wind the webthereon, means for rotating the mandrel holder to advance a succeedingmandrel into the path of the web which is being wound on an advancedmandrel, transfer means for deflecting a portion of the web between saidtwo mandrels to a position partially around said succeeding mandrelwhile said web is still being wound on the advanced mandrel, means forthereafter momentarily retarding the winding of the web on said advancedmandrel to create slack in that portion of the web which is partiallyaround said succeeding mandrel, mechanism operable on said slack whilesaid retarding mean is effective for breaking the web on a weakened tearline and causing winding on said succeeding mandrel, and means forcausing a momentary pause in the rotation of the mandrel holder whilethe transfer of the web is being effected.

PETER, J. CHRISTMAN.

